Granted Patent
Utility
US 4,032,920 · App. 05/609,627
Two-frequency instrument landing system with integral monitor
Inventors:
Edwin J. Martin, Jr., Akemichi Yamada
Patented Case
View Patent ↗
Granted: Jun 28, 1977
Filed: Sep 2, 1975
Inventors
Edwin J. Martin, Jr.
Akemichi Yamada
Assignee (at issue)
Wilcox Electric, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.